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  • Plasmolysis-lnspired Nanoengineering of Functional Yolk-Shell Microspheres with Magnetic Core and Mesoporous Silica Shell

    Author(s)
    Yue, Qin
    Li, Jialuo
    Zhang, Yu
    Cheng, Xiaowei
    Chen, Xiao
    Pan, Panpan
    Su, Jiacan
    Elzatahry, Ahmed A
    Alghamdi, Abdulaziz
    Deng, Yonghui
    Zhao, Dongyuan
    Griffith University Author(s)
    Zhao, Dongyuan
    Year published
    2017
    Metadata
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    Abstract
    Yolk-shell nanomaterials with a rattle-like structure have been considered ideal carriers and nanoreactors. Traditional methods to constructing yolk-shell nanostructures mainly rely on multistep sacrificial template strategy. In this study, a facile and effective plasmolysis-inspired nanoengineering strategy is developed to controllably fabricate yolk-shell magnetic mesoporous silica microspheres via the swelling-shrinkage of resorcinol-formaldehyde (RF) upon soaking in or removal of n-hexane. Using Fe3O4@RF microspheres as seeds, surfactant-silica mesostructured composite is deposited on the swelled seeds through the ...
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    Yolk-shell nanomaterials with a rattle-like structure have been considered ideal carriers and nanoreactors. Traditional methods to constructing yolk-shell nanostructures mainly rely on multistep sacrificial template strategy. In this study, a facile and effective plasmolysis-inspired nanoengineering strategy is developed to controllably fabricate yolk-shell magnetic mesoporous silica microspheres via the swelling-shrinkage of resorcinol-formaldehyde (RF) upon soaking in or removal of n-hexane. Using Fe3O4@RF microspheres as seeds, surfactant-silica mesostructured composite is deposited on the swelled seeds through the multicomponent interface coassembly, followed by solvent extraction to remove surfactant and simultaneously induce shrinkage of RF shell. The obtained yolk-shell microspheres (Fe3O4@RF@void@mSiO2) possess a high magnetization of 40.3 emu/g, high surface area (439 m2/g), radially aligned mesopores (5.4 nm) in the outer shell, tunable middle hollow space (472-638 nm in diameter), and a superparamagnetic core. This simple method allows a simultaneous encapsulation of Au nanoparticles into the hollow space during synthesis, and it leads to spherical Fe3O4@RF@void-Au@mSiO2 magnetic nanocatalysts, which show excellent catalysis efficiency for hydrogenation of 4-nitrophenol by NaBH4 with a high conversion rate (98%) and magnetic recycling stability.
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    Journal Title
    Journal of the American Chemical Society
    Volume
    139
    Issue
    43
    DOI
    https://doi.org/10.1021/jacs.7b09055
    Subject
    Chemical sciences
    Science & Technology
    Physical Sciences
    Chemistry, Multidisciplinary
    Chemistry
    Li-Ion Batteries
    Publication URI
    http://hdl.handle.net/10072/407201
    Collection
    • Journal articles

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